They like acidic based fertilizers. Like said above, it doesn't take much to get them rolling. I planted some last year in 1 foot mounds of top soil mixed with manure and humus compost. They got watered regularly. They grew anywhere from 12' to 18' high and produced a nice yield of cones. I recommend getting them in the ground ASAP. If you're worried about freezing still, just cover with a heavy layer of mulch. You should mulch anyways, it's good for retaining moisture especially in dryer months of the summer.